Antenna



FIG. 1 is a top plan view of an antenna on a base in broken lines.

FIG. 2 is a side elevational view of the antenna of FIG. 1.

FIG. 3 is a front elevational view of the antenna of FIG. 1 with a base in broken lines.

FIG. 4 is a bottom plan view of the antenna of FIG. 1 on a base in broken lines.

FIG. 5 is a top perspective view of the antenna of FIG. 1.

FIG. 6 is a top plan view of the antenna of FIG. 1; and,

FIG. 7 is a front elevational view of the antenna of FIG. 6.

The broken lines in the figures depict environment only and form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 